Year	Total
1980	1582649200
1981	1502855200
1982	1436837600
1983	1374912000
1984	1310940400
1985	1252152000
1986	1227600000
1987	1227600000
1988	1227600000
1989	697549600
1990	738606000
1991	805987600
1992	763567200
1993	704778800
1994	679272000
1995	679272000
1996	645172000
1997	664268000
1998	695640000
1999	709280000
2000	698368000
2001	695640000
2002	643808000
2003	645172000
2004	586520000
2005	571516000
2006	596068000
2007	544058680
2008	511159000
2009	586929200
2010	576972000
2011	510313320
2012	510313320
2013	503657000
2014	494381800
2015	491381000
2016	451061160